Trimethylsilyloxy ω-bromonitriles and trimethylsilyloxy-γ,δ-unsaturated nitriles give clean 1,2-addition products with Grignard reagents that can be induced to undergo subsequent cyclization either directly or by addition of N-bromosuccinimide, respectively.
三甲基甲
硅烷氧基ω-
溴腈和三甲基甲
硅烷氧基-γ,δ-不饱和腈与
格氏试剂可得到干净的1,2-加成产物,可直接或通过添加N-
溴代琥珀
酰亚胺诱导其随后环化。